google-common[patch]: Fix remove additional properties util (#5862)

* google-common[patch]: Fix remove additional properties util

* chore: lint files

Author: bracesproul

libs/langchain-google-common/src/utils/zod_to_gemini_parameters.ts

@@ -8,37 +8,34 @@ import {
   GeminiJsonSchemaDirty,
 } from "../types.js";
 
-function removeAdditionalProperties(
-  schema: GeminiJsonSchemaDirty
+export function removeAdditionalProperties(
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  obj: Record<string, any>
 ): GeminiJsonSchema {
-  const updatedSchema: GeminiJsonSchemaDirty = { ...schema };
-  if (Object.hasOwn(updatedSchema, "additionalProperties")) {
-    delete updatedSchema.additionalProperties;
-  }
-  if (updatedSchema.properties) {
-    const keys = Object.keys(updatedSchema.properties);
-    removeProperties(updatedSchema.properties, keys, 0);
-  }
-  if (Object.hasOwn(updatedSchema, "items") && updatedSchema.items) {
-    updatedSchema.items = removeAdditionalProperties(updatedSchema.items);
-  }
+  if (typeof obj === "object" && obj !== null) {
+    const newObj = { ...obj };
 
-  return updatedSchema;
-}
+    if (
+      "additionalProperties" in newObj &&
+      typeof newObj.additionalProperties === "boolean"
+    ) {
+      delete newObj.additionalProperties;
+    }
+
+    for (const key in newObj) {
+      if (key in newObj) {
+        if (Array.isArray(newObj[key])) {
+          newObj[key] = newObj[key].map(removeAdditionalProperties);
+        } else if (typeof newObj[key] === "object" && newObj[key] !== null) {
+          newObj[key] = removeAdditionalProperties(newObj[key]);
+        }
+      }
+    }
 
-function removeProperties(
-  properties: Record<string, GeminiJsonSchemaDirty>,
-  keys: string[],
-  index: number
-): void {
-  if (index >= keys.length) {
-    return;
+    return newObj as GeminiJsonSchema;
   }
 
-  const key = keys[index];
-  // eslint-disable-next-line no-param-reassign
-  properties[key] = removeAdditionalProperties(properties[key]);
-  removeProperties(properties, keys, index + 1);
+  return obj as GeminiJsonSchema;
 }
 
 export function zodToGeminiParameters(
@@ -48,9 +45,7 @@ export function zodToGeminiParameters(
   // Gemini doesn't accept either the $schema or additionalProperties
   // attributes, so we need to explicitly remove them.
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  const jsonSchema = removeAdditionalProperties(
-    zodToJsonSchema(zodObj) as GeminiJsonSchemaDirty
-  );
+  const jsonSchema = removeAdditionalProperties(zodToJsonSchema(zodObj));
   const { $schema, ...rest } = jsonSchema;
 
   return rest;